Mix first 5 ingredients in small bowl. Cover and refrigerate until ready to use. Cook bacon in heavy large skillet over medium heat until crisp. Transfer to paper towels and drain. Toast bread. Spread mayonnaise mixture evenly over bread slices. Cover 2 bread slices with turkey, then tomato, avocado and bacon. Season generously with salt and pepper. Top with lettuce and remaining bread slices. Cut diagonally into quarters. Skewer each with frilly toothpick if desired and serve.